private void Handle_ToolTipOpened(object sender, RoutedEventArgs e)
{
var cm = sender as ToolTip;
if (cm != null && cm.PlacementTarget != null)
{
var scale = DpiEvents.GetWindowDpiScale(cm.PlacementTarget);
DpiEvents.ScaleElement(cm, scale);
Debug.WriteLine("ToolTip scale = " + scale);
}
}
private void RescaleForDpi()
{
var test = Shcore.ProcessDpiAwareness;
if (test == CommonWin32.HighDPI.PROCESS_DPI_AWARENESS.PROCESS_PER_MONITOR_DPI_AWARE)
{
var child = VisualTreeHelper.GetChild(ContentWindow, 0) as FrameworkElement;
if (child != null)
{
DpiEvents.ScaleElement(child, _dpiScaleFactor, true);
}
}
var dpiArgs = new DpiChangeEventArgs(ContentWindow, _monitorDPI, _dpiScaleFactor);
ContentWindow.RaiseEvent(dpiArgs);
DpiEvents.SetWindowDpi(ContentWindow, dpiArgs.NewDpi);
DpiEvents.SetWindowDpiScale(ContentWindow, dpiArgs.Scale);
}
/// <summary>
/// Converts a TextBlock value to boolean true if too small.
/// </summary>
/// <param name="values">The values.</param>
/// <param name="targetType">Type of the target.</param>
/// <param name="parameter">The parameter.</param>
/// <param name="culture">The culture.</param>
/// <returns></returns>
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
var tooSmall = false;
if (values != null)
{
foreach (var value in values)
{
var tb = value as TextBlock;
if (tb != null)
{
var dpi = DpiEvents.GetWindowDpi(tb);
tooSmall = dpi <= 96 && tb.FontSize <= Threshold;
break;
}
}
}
return(tooSmall);
}